root / hw / petalogix_s3adsp1800_mmu.c @ 0c3271c5
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/*
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* Model of Petalogix linux reference design targeting Xilinx Spartan 3ADSP-1800
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* boards.
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*
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* Copyright (c) 2009 Edgar E. Iglesias.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "sysbus.h" |
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#include "hw.h" |
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#include "net.h" |
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#include "flash.h" |
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#include "sysemu.h" |
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#include "devices.h" |
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#include "boards.h" |
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#include "device_tree.h" |
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#include "xilinx.h" |
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#define LMB_BRAM_SIZE (128 * 1024) |
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#define FLASH_SIZE (16 * 1024 * 1024) |
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static uint32_t bootstrap_pc;
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static void main_cpu_reset(void *opaque) |
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{ |
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CPUState *env = opaque; |
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cpu_reset(env); |
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env->sregs[SR_PC] = bootstrap_pc; |
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} |
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#define BINARY_DEVICE_TREE_FILE "petalogix-s3adsp1800.dtb" |
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static int petalogix_load_device_tree(target_phys_addr_t addr, |
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uint32_t ramsize, |
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target_phys_addr_t initrd_base, |
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target_phys_addr_t initrd_size, |
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const char *kernel_cmdline) |
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{ |
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#ifdef HAVE_FDT
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void *fdt;
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int r;
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#endif
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char *path;
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int fdt_size;
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#ifdef HAVE_FDT
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/* Try the local "mb.dtb" override. */
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fdt = load_device_tree("mb.dtb", &fdt_size);
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if (!fdt) {
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path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE); |
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if (path) {
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fdt = load_device_tree(path, &fdt_size); |
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qemu_free(path); |
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} |
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if (!fdt)
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return 0; |
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} |
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r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline); |
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if (r < 0) |
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fprintf(stderr, "couldn't set /chosen/bootargs\n");
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cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
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#else
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/* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
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to the kernel. */
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fdt_size = load_image_targphys("mb.dtb", addr, 0x10000); |
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if (fdt_size < 0) { |
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path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE); |
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if (path) {
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fdt_size = load_image_targphys(path, addr, 0x10000);
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qemu_free(path); |
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} |
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} |
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if (kernel_cmdline) {
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fprintf(stderr, |
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"Warning: missing libfdt, cannot pass cmdline to kernel!\n");
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} |
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#endif
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return fdt_size;
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} |
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static void |
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petalogix_s3adsp1800_init(ram_addr_t ram_size, |
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const char *boot_device, |
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const char *kernel_filename, |
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const char *kernel_cmdline, |
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const char *initrd_filename, const char *cpu_model) |
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{ |
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DeviceState *dev; |
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CPUState *env; |
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int kernel_size;
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int i;
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target_phys_addr_t ddr_base = 0x90000000;
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ram_addr_t phys_lmb_bram; |
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ram_addr_t phys_ram; |
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ram_addr_t phys_flash; |
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qemu_irq irq[32], *cpu_irq;
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/* init CPUs */
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if (cpu_model == NULL) { |
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cpu_model = "microblaze";
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} |
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env = cpu_init(cpu_model); |
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env->pvr.regs[10] = 0x0c000000; /* spartan 3a dsp family. */ |
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qemu_register_reset(main_cpu_reset, env); |
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/* Attach emulated BRAM through the LMB. */
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phys_lmb_bram = qemu_ram_alloc(LMB_BRAM_SIZE); |
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cpu_register_physical_memory(0x00000000, LMB_BRAM_SIZE,
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phys_lmb_bram | IO_MEM_RAM); |
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phys_ram = qemu_ram_alloc(ram_size); |
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cpu_register_physical_memory(ddr_base, ram_size, phys_ram | IO_MEM_RAM); |
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phys_flash = qemu_ram_alloc(FLASH_SIZE); |
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i = drive_get_index(IF_PFLASH, 0, 0); |
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pflash_cfi02_register(0xa0000000, phys_flash,
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i != -1 ? drives_table[i].bdrv : NULL, (64 * 1024), |
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FLASH_SIZE >> 16,
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1, 1, 0x0000, 0x0000, 0x0000, 0x0000, |
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0x555, 0x2aa); |
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cpu_irq = microblaze_pic_init_cpu(env); |
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dev = xilinx_intc_create(0x81800000, cpu_irq[0], 2); |
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for (i = 0; i < 32; i++) { |
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irq[i] = qdev_get_gpio_in(dev, i); |
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} |
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sysbus_create_simple("xilinx,uartlite", 0x84000000, irq[3]); |
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/* 2 timers at irq 2 @ 62 Mhz. */
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xilinx_timer_create(0x83c00000, irq[0], 2, 62 * 1000000); |
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xilinx_ethlite_create(&nd_table[0], 0x81000000, irq[1], 0, 0); |
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if (kernel_filename) {
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uint64_t entry, low, high; |
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int kcmdline_len;
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uint32_t base32; |
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/* Boots a kernel elf binary. */
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kernel_size = load_elf(kernel_filename, 0,
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&entry, &low, &high); |
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base32 = entry; |
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if (base32 == 0xc0000000) { |
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kernel_size = load_elf(kernel_filename, -0x30000000LL,
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&entry, NULL, NULL); |
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} |
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/* Always boot into physical ram. */
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bootstrap_pc = ddr_base + (entry & 0x0fffffff);
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if (kernel_size < 0) { |
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/* If we failed loading ELF's try a raw image. */
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kernel_size = load_image_targphys(kernel_filename, ddr_base, |
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ram_size); |
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bootstrap_pc = ddr_base; |
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} |
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env->regs[5] = ddr_base + kernel_size;
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if (kernel_cmdline && (kcmdline_len = strlen(kernel_cmdline))) {
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pstrcpy_targphys(env->regs[5], 256, kernel_cmdline); |
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} |
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env->regs[6] = 0; |
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/* Provide a device-tree. */
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env->regs[7] = ddr_base + kernel_size + 256; |
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petalogix_load_device_tree(env->regs[7], ram_size,
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env->regs[6], 0, |
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kernel_cmdline); |
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} |
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env->sregs[SR_PC] = bootstrap_pc; |
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} |
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static QEMUMachine petalogix_s3adsp1800_machine = {
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.name = "petalogix-s3adsp1800",
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.desc = "Petalogix linux refdesign for xilinx Spartan 3ADSP1800",
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.init = petalogix_s3adsp1800_init, |
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.is_default = 1
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}; |
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static void petalogix_s3adsp1800_machine_init(void) |
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{ |
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qemu_register_machine(&petalogix_s3adsp1800_machine); |
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} |
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machine_init(petalogix_s3adsp1800_machine_init); |